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Alekssandra [29.7K]

3 years ago

7

Assume that a particular professional baseball team has 9 pitchers, 6 infielders, and 12 other players. If 3 players' names a

re selected at random, determine the probability that all 3 are infielders.

1 answer:

Lana71 [14]3 years ago

8 0

Answer:

1/9

Step-by-step explanation:

total professional players = 27

pr(3 infielders) = 3 ÷ 27

= 1/9

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Help answer and EXPLAIN STEP BY STEP

pychu [463]

15. $(-k^{3} -5k^{2} + 1) - (6k^{3}-k^{2} -2)$

Step 1: Distribute the subtraction sign to all the numbers in the second set of parentheses...

$(-k^{3} -5k^{2} + 1) - (6k^{3}-k^{2} -2)$

$-k^{3} -5k^{2} +1 - 6k^{3} +k^{2} +2$

Step 2: Combine like terms ( $k^{2}$ 's go with $k^{2}$ 's)

$-k^{3} -5k^{2} + 1 - 6k^{3}+k^{2} +2$

$-5k^{2} +k^{2}$

$-4k^{2}$

$-k^{3} -4k^{2} + 1 - 6k^{3}+2$

Step 3: Combine like terms ( $k^{3}$ 's go with $k^{3}$ 's)

$-k^{3} -4k^{2} + 1 - 6k^{3}+2$

$-k^{3} + (- 6k^{3})$

$-7k^{3}$

$-7k^{3} -4k^{2} + 1 +2$

Step 4: Combine like terms (normal numbers go with normal numbers)

$-7k^{3} -4k^{2} + 1 +2$

1 + 2

3

$-7k^{3} -4k^{2} + 3$

You were correct!

16. $49m^2 - 84mn + 36n^2$

I don't really know how to explain this one but I got: (7m-6n)(7m-6n)

7 0

4 years ago

A teacher gave a test with 50 questions, each worth the same number of points. Donovan got 38 out of 50 questions right. Marcis

melisa1 [442]

Answer:

38

Step-by-step explanation:

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8 0

3 years ago

Find the number a and b with ab+ba is số chính phương

Lana71 [14]

Answer:

(2,9) , (3,8) , (4,7) , (5,6)

Step-by-step explanation:

ab+ba = 10a+b+10b+a = 11a+11b = 11(a+b)

if a+b = 11 then ab+ba = 11²

(a,b) or (b,a) : (2,9) , (3,8) , (4,7) , (5,6)

check: 29+92 = 121 = 11²

56+65 = 121 = 11²

6 0

3 years ago

A scuba diver descends in the water at a rate of 20 1/2 feet per minute for 2.8 minutes. He immediately changes course when he s

N76 [4]

Answer:

7.4 feet below sea level

Step-by-step explanation:

Assumed the starting point is the sea level 0.

<u>After 2.8 min the diver is at position:</u>

20 1/2 * 2.8 =
20.5 * 2.8 =
57.4 feet below sea level

<u>The position change after next 2 minutes:</u>

25*2 = 50 feet

<u>The position of the diver after 4.8 min:</u>

57.4 - 50 = 7.4 feet below sea level

3 0

3 years ago

How many radians is 40°?<br> Give the exact answer in simplest form.<br> radians

fredd [130]

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$\frac{D}{180°} = \frac{ Rad }{\pi} \\$

$D = the \: \: measure \: \: of \: \: angle \: \: in \: \: degree \\$

$Rad= the \: \: measure \: \: of \: \: angle \: \: in \: \: radian \\$

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$\frac{40}{180} = \frac{ Rad }{\pi} \\$

$\frac{ Rad }{\pi} = \frac{4}{18} \\$

$\frac{Rad}{\pi} = \frac{2}{9} \\$

Multiply sides by π

$\pi \times \frac{Rad}{\pi} = \pi \times \frac{2}{9} \\$

$Rad = \frac{2}{9} \pi \\$

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3 0

3 years ago